﻿#region Copyright
// Copyright (c) 2011-2012 RaisingForce Team (Alikin Sergey)
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Diagnostics.Contracts;
using RaisingForce.Raise.Language.Rules;

namespace RaisingForce.Raise.Language.RStates
{
    public static class RStateMutableContextStateExtensions
    {
        #region Extension Methods

        public static void Set(
            this IRStateMutableContextState destContextState,
            IRStateContextState sourceContextState)
        {
            Contract.Requires(destContextState != null);
            Contract.Requires(sourceContextState != null);
            destContextState.CounterState = sourceContextState.CounterState;
            destContextState.CounterValue = sourceContextState.CounterValue;
            destContextState.CounterInitializedState = sourceContextState.CounterInitializedState;
            destContextState.CurrentChain = sourceContextState.CurrentChain;
            destContextState.PreviousChain = sourceContextState.PreviousChain;
            destContextState.ObjectPosition = sourceContextState.ObjectPosition;
        }

        public static void SetValue<T>(
            this IRStateMutableContextState state,
            T value)
            where T : RState
        {
            if (state == null)
            {
                throw new ArgumentNullException("state");
            }
            if (value == null)
            {
                throw new ArgumentNullException("value");
            }
            if (!RStateRules.TypeIsValid(typeof(T)))
            {
                throw new ArgumentException("T");
            }
            Contract.EndContractBlock();
            if (typeof(T) == typeof(CounterState))
            {
                state.CounterState = (CounterState)(RState)value;
            }
            else if (typeof(T) == typeof(CounterValue))
            {
                state.CounterValue = (CounterValue)(RState)value;
            }
            else if (typeof(T) == typeof(CounterInitializedState))
            {
                state.CounterInitializedState = (CounterInitializedState)(RState)value;
            }
            else if (typeof(T) == typeof(CurrentChain))
            {
                state.CurrentChain = (CurrentChain)(RState)value;
            }
            else if (typeof(T) == typeof(PreviousChain))
            {
                state.PreviousChain = (PreviousChain)(RState)value;
            }
            else if (typeof(T) == typeof(ObjectPosition))
            {
                state.ObjectPosition = (ObjectPosition)(RState)value;
            }
            else
            {
                throw new NotSupportedException();
            }
        }

        #endregion
    }
}
